Moreover, it is revealed that the deformation resistance in the thermal cycle process is related to the increase of its tensile stress and the decrease of yield strength.

研究进一步表明，材料变形的难易程度又与变温循环过程，热疲劳试样拉伸应力的增加和材料屈服强度的降低有关。

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The longitudinal yield strength and the Young′s modulus increase with the draw ratio.

纵向屈服强度和模量随拉伸比增加而提高。

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All these results show that severe plastic deformation occurred on the grinding surface, the strain strengthening is the basic reason for the increase of the yield strength in grinding affected layer.

这些结果说明，磨削表面发生了严重的塑性形变。冷作塑性形变强化是磨削影响层的屈服强度得以提高的根本原因。

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